Process of making single-tube pneumatic tires.



PATENTED NOV. 17, 1903.

T. R. PALMER PROCESS 0F MAKING SNGLE TUBE PNEUMATIC TIRES.

APPLIGA'LION FILED .TUNE 11, 1903 No. 744,394.y

N0 MODEL.

- UNITE-D o STAfrns Patented November 17,19Ui3.

nTnNT- l(Mi-non,

THESRON R. PALMER, OF JEANNETTE, PENNSYLVANA.

, srncrnoarlon fome-.g part of Letters Patent no. rre/asse, dated November 1r, reos.

Application iiled June 11.1903.

Be it known that LTHERON R; PALMER, a

`:citizen of thc UnitedStates, residingat Jean- I new and useful Improvementsin Processes otMakingSingle-Tube Pneumatic Tires; and I do hereby declare the following t0' be a full, clear, and exact description of the invent-ion, such as will enable others skilled in the art to which it -appertai-ns to make and use the saine, reference being had to the accompanying drawings, and to the letters of reference marked thereon, forming part of this speci'- fication.,A if' My invention relates to improvements in the process lof making single-tube or hose-pipe pneumatic tires,and has for its objects the production ofcontinuonsannularpneumatietires from the constituent elements thereof-viz., canvas and sheet-rubber-in such a manner that lain enabled to use am uch thinner sheet of rubber to form the inner lining or air-tube than: is now used in the constructionl ot such tires and at the saine timeto overcome the liability of air-bubbles forming between the inner lining or air-tube and the canvas layer ofthe tire surrounding itduring the vulcanization of the tire, and thereby causing leaks therein, which difeultyis a serious one in the manufacture of tires on account of the losses caused by defective tires caused thereby.

Other advantages of my invention consist in the manipulation ofthe material being formed'into a tire'so as to greatly simplify and reducethe labor of making a continuous annular vtire withoutthe usual splice to join the ends of the tire after it is made into a hose-like form and entirely avoiding the use of inairdiels and other appliances in forming Thefe'atures of my invention are hereinafter set forth and d`esc'ribe`d,.and illustrated in the yaccompanying drawings, in Whichinto a tube.

Figure 1 illustrates a strip of frietioned canvas with a strip of thin rubber lining ready to be made into an inner tube or tire-lining.

Fig. 2 illustrates the forming up of this strip Fig. 3 illustratesa top lor plan view of this tube inflated and being covered with the remaining layers of frictioned canvas and rubber necessary to complete -the Serial No. i6l,027. (No model.)

tirercady for vnlcanization. Fig. 4 illustrates a side View of same in elevation during the same process. 55

'In the practice of myinvention 1 rst take suitable lcanvas frictioned with rubber on bothsides and cut it diagonally into strips of the proper width to form the tube and join such strips by overlapping the ends thereof 16e until I have formed a strip of such elotle'f sufficient length to form a tire. I then cnt ai strip of thin sheet-rubber of the same Width and length d lay said strip of frictioned canvas and e e p of rubber together with s55 one end andA one age ofthe canvas Aextending somewhat be;Y nd the end and side of the strip of rubber.v illustrated' by thestrip of canvas A- 'and strip of rubber B in Fig. l. i then paf-wf this composite strip of canvas and fr rubber between calender-rolls, vso as to firmly unite them and drive out all air which might possibly be between them. I then draw aline@ (see Fig. l) along the side at of the canvas strip A, beyond which the rubber stripB projects, 75" so as to form aguide foroverlapping the opposite edge of the canvas strip thereon when the edges are folded together, as illustrated 'in Fig. 2. I then place this strip of canvas and rubber around a suitable projecting table D, 8o with the rubber face thereof uppermost, and bring the ends thereof around and join them together by overlapping them, so as to form a splice E between them. After this splice il has-been pressedftogether, so as to adhere 8g firmly, I insert a valve-stem F through thisv strip near one edge thereof in the usual manner. I then soapstone the central part of the rubber face of this strip to prevent adherence when folded over, as illust-rated in Fig. 2, and 9o I then proceed to fold the edges of the strip' together,bringing the opposite edge a of the( 'canvas over the edge a thereof to the guideline C thereon, which brings the projecting Y l edge b ot' the rubber under the edge b' there- 95 of, so as to form an overlapping joint there- With,as illustrated inFig, 2,and lirmly press or roll down the joints so formed until the entire strip is formed into an ann ular tube H. l th take this tube so formed and inflateitunti assumes the form illustrated in e, and having prepared the additional of frictioned canvas and rubber l, neces y lto'cornplete the tire, l'. place them. around a posite strip of canvas and rubber together so as to form an annular bund or ring thereof before I proceed to forni the same up into ntuhe. itin obvious, however, that I con, ifI desiie,forinup thegreaterpartoftheetripinto n. tube before splicing the ends of the strip together und then complete the forming up of the remninder thereof into tubular form, no ns to com plete it into nu annular tube,with out departing from the spi rit of my invention.

Hering thus described my invention, so as to enable others to utilize and practice the suine, what I claim ns new, and desire to se- 'curo by Letters Patent oit' the United States,

A process of makingsingle-tube pneumatic tires, consisting substantially of imposing one strip of canvas, frictioned on both sides und of sufficient width and length to form the outside layer of the inner tube of the tire, upon n strip of sheet-rubber, of like width and length as said strip of canvas, so as to project over said rubber strip at one end and one edge thereof, uniting said strip of canvas and rubber together without leaving nny air between them, securing the valve-stem therein, and folding the opposite edges of said composite strip over together and joining their edges :ind ends so as to form said composite strip into au annular tube, and then intluting the annular tnbeso formed and rolling the outer layers of the tire thereon, substantially as set forth.

In testimony whereof I aliix my signature 

